6640143232 has 16 divisors (see below), whose sum is σ = 13228410600. Its totient is φ = 3320071552.

The previous prime is 6640143179. The next prime is 6640143269. The reversal of 6640143232 is 2323410466.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 6640143194 and 6640143203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25937932 + ... + 25938187.

Almost surely, 2^6640143232 is an apocalyptic number.

It is an amenable number.

6640143232 is a deficient number, since it is larger than the sum of its proper divisors (6588267368).

6640143232 is an equidigital number, since it uses as much as digits as its factorization.

6640143232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51876133 (or 51876121 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 6640143232 is about 81487.0740179079. The cubic root of 6640143232 is about 1879.5727896040.

Adding to 6640143232 its reverse (2323410466), we get a palindrome (8963553698).

The spelling of 6640143232 in words is "six billion, six hundred forty million, one hundred forty-three thousand, two hundred thirty-two".